git: make dirstate status() respect matcher

As with other changes in this stack, we appear to have been getting
lucky in the past. An upcoming change behaved _very_ oddly without
this fix.

Differential Revision: https://phab.mercurial-scm.org/D8997

hgext/git/dirstate.py

@@ -142,6 +142,8 b' class gitdirstate(object):'
         gstatus = self.git.status()
         for path, status in gstatus.items():
             path = pycompat.fsencode(path)
+            if not match(path):
+                continue
             if status == pygit2.GIT_STATUS_IGNORED:
                 if path.endswith(b'/'):
                     continue